<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body bgcolor="yellow">
		<div align="center">
		<form action="area" method="post">
		梯形的上底:&nbsp;<input type="text" name="up"><br>
		梯形的下底:&nbsp;<input type="text" name="down"><br>
		梯形的高:&nbsp;<input type="text" name="height"><br>
		<input type="submit" value="提交">&nbsp;&nbsp;
		<input type="reset" value="重置"><br>
		
		
		</form>
		</div>
</body>
</html>